26 Answers votes newest views recent -2Rational functions with a common iterate 11Is there any techniques for solving a differential equation including iterated function? f ' (x) = f( f( x ) ) (2) -9What is convolution intuitively? 12Computer Algebra Errors (2) -1Is there integral analog of Ramanujan sum? 1What does the adjective “natural” actually mean? -20What if Current Foundations of Mathematics are Inconsistent? 1Summation of an expression 1Does any research mathematics involve solving functional equations? 0Verifying a sequence that converges to pi 1Open problems and known identities involving sums 2The functional equation $f(f(x))=x+f(x)^2$ (2) 1On partial sums of the zeta function, or $1/1 + 1/2 + 1/3 + … + 1/n$ 1Examples of sequences whose asymptotics can’t be described by elementary functions 1Does the exponential function have a square root? 0The non-convergence of f(f(x))=exp(x)-1 and labeled rooted trees 29What are some correct results discovered with incorrect (or no) proofs? 1Is there any finitely-long sequence of digits which is not found in the digits of pi? 6f(f(x))=exp(x)-1 and other functions “just in the middle” between linear and exponential. (2) 2What are you using for symbolic computation? 4What’s a natural candidate for an analytic function that interpolates the tower function? (2) 24How to solve f(f(x)) = cos(x) ? 2Laplace’s summation formula 18What is the indefinite sum of tan(x)? (2) 1Multiplicative integral of $\Gamma(x)$ 13Why is the Gamma function shifted from the factorial by 1?